If they updated the manager and got the linkage working, it could work solely with G6. And if that was the case, you could then transfer your g6 save to a legit ds game afterward. But so far it's not possible.

The ONLY way to migrate pokemans to a legit DS cart is with a legit GBA pokemon cart. This will probably never change. You can transfer a save from a DLDI compatible slot 2 flashcart to a legit GBA pokemon game with the GBA Game Save Backup Utility.

Currently, the only way to migrate pokemans from a GBA flashcart is to use an EZ-V and an EZ-Flash 3-in-1.